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Finding the Fourth Proportional to 12,560.97, 18,804.56 and 8,390.69

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Solution

The fourth proportional to 12,560.97, 18,804.56 and 8,390.69 is: 12,561.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,560.97 : 18,804.56 = 8,390.69 : x
  2. Step 2: Convert to fraction form
    12,560.97/18,804.56 = 8,390.69/x
  3. Step 3: Cross multiply
    12,560.97x = 18,804.56 × 8,390.69
  4. Step 4: Simplify right side
    12,560.97x = 157,783,168.09
  5. Step 5: Solve for x
    x = 157,783,168.09/12,560.97
  6. Step 6: Final answer
    x = 12,561.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.